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Materials 2010, 3(2), 1089-1103; doi:10.3390/ma3021089
Article

A Route for Polymer Nanocomposites with Engineered Electrical Conductivity and Percolation Threshold

1,2,* , 3
 and
2,3
Received: 17 January 2010 / Revised: 28 January 2010 / Accepted: 8 February 2010 / Published: 9 February 2010
(This article belongs to the Special Issue Nanocomposites of Polymers and Inorganic Particles)
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Abstract

Polymer nanocomposites with engineered electrical properties can be made by tuning the fabrication method, processing conditions and filler’s geometric and physical properties. This work focuses on investigating the effect of filler’s geometry (aspect ratio and shape), intrinsic electrical conductivity, alignment and dispersion within the polymer, and polymer crystallinity, on the percolation threshold and electrical conductivity of polypropylene based nanocomposites. The conductive reinforcements used are exfoliated graphite nanoplatelets, carbon black, vapor grown carbon fibers and polyacrylonitrile carbon fibers. The composites are made using melt mixing followed by injection molding. A coating method is also employed to improve the nanofiller’s dispersion within the polymer and compression molding is used to alter the nanofiller’s alignment.
Keywords: exfoliated graphite; carbon fibers; percolation threshold; processing exfoliated graphite; carbon fibers; percolation threshold; processing
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kalaitzidou, K.; Fukushima, H.; Drzal, L.T. A Route for Polymer Nanocomposites with Engineered Electrical Conductivity and Percolation Threshold. Materials 2010, 3, 1089-1103.

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